Add possibility to assign annotations to Kourier LoadBalancer

[timosur]

Problem Currently it is not possible to assign annotations to the Kourier LoadBalancer. We currently have a hard requirement to do that as we need to set azure-load-balancer-internal annotation. Otherwise our LoadBalancer will just be rejected by our company Azure Policies.

Persona: Which persona is this feature for? System Operator

Exit Criteria A measurable (binary) test that would indicate that the problem has been resolved. It is possible to assign azure-load-balancer-internal to the Kourier LoadBalancer.

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[norbjd]

Hello @timosur, we had a similar need (with another annotation), and found a solution by using the spec.services.annotations field in KnativeServing object:

$ kubectl explain knativeserving.spec.services.annotations
GROUP:      operator.knative.dev
KIND:       KnativeServing
VERSION:    v1beta1

FIELD: annotations <map[string]string>

DESCRIPTION:
    Annotations overrides labels for the service

To define annotations on kourier service, just use:

apiVersion: operator.knative.dev/v1beta1
kind: KnativeServing
metadata:
  name: knative-serving
  namespace: knative-serving
spec:
  ingress:
    kourier:
      enabled: true
  services:
    - name: kourier
      annotations:
        azure-load-balancer-internal: "the-value-you-want"

The kourier service will now have the azure-load-balancer-internal annotation. Hope that helps.